comparative experiments

comparative experiments

[kəm′par·əd·iv ik′sper·ə·məns]
(statistics)
Experiments conducted to determine statistically whether one procedure is better than another.
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Bailey wrote in Design of Comparative Experiments, "For a given illness, if there is already a standard drug that is known to be effective, then it is not ethical to give no treatment in a clinical trial of a new drug for that illness.
The tutorial progresses from simple comparative experiments and experiments with a single factor, through robust parameter design, experiments with random factors, and nested and split-plot designs.
We considered the cost and quality aspects of formulating a freeze media in-house against selecting a pre-formulated GMP manufactured commercial product, and completed a series of comparative experiments.
Comparative experiments were also done on Subject A and C with chloroform and diethyl ether by asking them to inhale the vapours of chloroform and diethyl respectively for 5 sec and compare the brain effect felt with those in the two sets of experiments described above.
Comparative experiments dating back to the 1930s have compared different forms of psychotherapy, contrasting theoretical orientations (for example, behavioral versus psychodynamic), methods (for example, insight-oriented versus supportive), and structures (for example, individual versus group or family).
In one meta-analysis of comparative experiments, Kazdin and Bass found that the median sample size for intervention groups was 12.
Statistical methods in this book include: variance components analysis, variance transmission analysis, risk-based control charts, capability and performance indices, quality planning, regression analysis, comparative experiments, descriptive statistics, sample size determination, confidence intervals, tolerance intervals, and measurement systems analysis.
Introduction; Basic statistics; Comparative experiments and regression analysis; Control charts; Process capability; Other useful charts; Variance components analysis; Quality planning with variance components; Measurement systems analysis; What colour is your belt?
Application: Comparative experiments on organosolv delignification of Arundo donax are necessary to select more promising pulping processes with possible use for additional optimization of pulping conditions.
To be valid, comparative experiments have to be made at the same time and on as comparable patients as possible.
In addition, Amine Reactive Sensors are compatible with regeneration for increased throughput or rapid comparative experiments.
Gorodeski and his team, whose research was funded by grants from the National Institutes of Health and the American Heart Association, performed comparative experiments on common epithelial uterine cancers that comprise more than 95 percent of all uterine cancers and found their results were consistent, regardless of tumor type.

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